Introducción

Esta tarta de boniato y queso feta es una pieza central espectacular que combina a la perfección sabores dulces y salados en cada bocado. El dulzor caramelizado del boniato asado contrasta a la perfección con el sabor ácido del queso feta, mientras que el romero y el ajo aromáticos le aportan profundidad y complejidad. Envuelta en una masa de hojaldre mantecoso y cubierta con una suave crema pastelera, esta tarta es ideal para un brunch informal, una cena elegante o una reunión especial en días festivos. Servida caliente, recién salida del horno, o a temperatura ambiente, esta espectacular tarta impresionará incluso a los paladares más exigentes.

Ingredientes

Para el relleno:

• 500 g (aproximadamente 1,1 lb) de batata, pelada y cortada en cubos de 1 cm
• 2 cucharadas (30 ml) de aceite de oliva
• 2 dientes de ajo picados gruesamente
• 2-3 cucharadas de hojas frescas de romero, finamente picadas
• Sal y pimienta negra recién molida, al gusto.
• 2 cucharadas de cebollas caramelizadas
• 125 g (4,4 oz) de queso feta desmenuzado

Para las natillas:

• 125 ml (½ taza) de crema batida
• 125 ml (½ taza) de leche entera
• 1 huevo entero
• 1 yema de huevo
• Sal y pimienta al gusto

Para la masa:

• 1 lote de masa de espelta Kamut o 1 lámina de masa quebrada comprada previamente

Instrucciones

1. Asar las batatas : Precalentar el horno a 200 °C (400 °F) o 180 °C con ventilador. Colocar las batatas peladas y cortadas en cubos en un tazón grande. En un procesador de alimentos pequeño o con un cuchillo, picar finamente el ajo y el romero. Mezclar con aceite de oliva, sal y pimienta, y mezclar bien los cubos de batata. Extender las batatas sazonadas en una sola capa sobre una bandeja para hornear y asar durante aproximadamente 30 minutos, hasta que estén doradas y tiernas. Retirar del horno y reservar.
2. Prepara la base de la tarta : Reduce la temperatura del horno a 190 °C (375 °F) o 170 °C con ventilador. Extiende la masa hasta que encaje en un molde de tarta de 23-25 ​​cm (9-10 pulgadas) con fondo desmontable. Forra el molde con cuidado con la masa, presionando en las esquinas y recortando el exceso. Pincha la base con un tenedor, luego cúbrela con papel de horno y rellénala con pesas de cerámica o frijoles secos. Hornea a ciegas durante 10-15 minutos hasta que los bordes comiencen a dorarse ligeramente. Retira las pesas y el papel, y hornea durante 10 minutos más hasta que la base esté firme y ligeramente dorada.
3. Preparación de la crema pastelera : En un tazón mediano, bata la crema batida, la leche entera, el huevo entero, la yema de huevo, la sal y la pimienta hasta que estén bien mezclados. Reserve.
4. Assemble the tart: Keep the oven at 190°C (375°F) or 170°C fan forced. Place the partially baked tart shell on a baking tray. Spread the caramelized onions evenly over the base of the tart shell. Distribute the roasted sweet potato cubes over the onions, then scatter the crumbled feta cheese throughout. Carefully pour the custard mixture into the tart shell until it reaches about two-thirds full.
5. Bake the tart: Place the tart in the preheated oven and bake for 10 minutes. Then reduce the oven temperature to 180°C (350°F) or 160°C fan forced and continue baking for another 10 minutes, or until the custard is set and the tart is golden on top. The custard should be just set but still have a slight wobble in the center.
6. Rest and serve: Remove the tart from the oven and allow it to rest for at least 10 minutes before serving. This tart can be served warm or at room temperature.

Nutritional Information and Timing

Preparation Time: 20 minutes
Cooking Time: 1 hour
Total Time: 1 hour 20 minutes (plus 10 minutes resting time)
Servings: 8 slices

Nutritional Information (per slice):

• Calories: 320
• Protein: 8g
• Carbohydrates: 28g
• Fat: 20g
• Fiber: 3g
• Sodium: 350mg

Cooking Tips and Tricks

• Even sweet potato cubes: Try to cut your sweet potato into uniformly sized cubes to ensure they cook evenly. Aim for 1cm (about ⅓ inch) cubes for the best texture and cooking time.
• Blind baking success: When blind baking the tart shell, ensure the baking paper extends up the sides to prevent the weights from pressing directly into the pastry.
• Preventing a soggy bottom: For an extra-crisp base, you can brush the blind-baked tart shell with a little beaten egg white before adding the fillings.
• Caramelized onions: If you don’t have prepared caramelized onions, make them by slowly cooking thinly sliced onions with a touch of olive oil and butter over low heat for 30-40 minutes until deeply golden and sweet.
• Custard filling: Pour the custard slowly into the tart to prevent it from overflowing. You can place the tart shell on the oven rack first, then pour in the remaining custard to avoid spills while transferring.
• Checking for doneness: The tart is ready when the custard is set around the edges but still has a slight wobble in the center. It will continue to set as it cools.

Variations and Substitutions

Cheese Options:

• Replace feta with goat cheese for a creamier texture and milder flavor
• Use crumbled blue cheese for a more pronounced, tangy flavor
• Try Gruyère or Comté for a nuttier taste that melts beautifully

Herb Alternatives:

• Substitute thyme for rosemary for a different aromatic profile
• Use sage leaves for an earthy, autumnal flavor
• Add a handful of fresh chopped parsley just before serving for brightness

Pastry Choices:

• Regular shortcrust pastry works perfectly if Kamut Spelt isn’t available
• For a gluten-free option, use a gluten-free pastry blend
• Puff pastry creates a lighter, flakier base for a more indulgent tart

Vegetable Variations:

• Add roasted red bell peppers for sweetness and color
• Include sautéed mushrooms for an earthy dimension
• Mix in baby spinach leaves just before baking for added nutrients and color

Dietary Adaptations:

• For a dairy-free version, use coconut cream instead of whipping cream and a plant-based milk alternative
• Replace feta with a dairy-free cheese alternative
• For a lighter option, use all milk instead of the cream and milk combination

Common FAQs

Q: Can I make this tart ahead of time? A: Yes, this tart is excellent for make-ahead meals. You can prepare it up to a day in advance and reheat gently before serving, or serve at room temperature.

Q: How do I know when the custard is properly set? A: The custard should be set around the edges but still have a slight wobble in the center. It will continue to firm up as it cools. If you insert a knife 1 inch from the edge, it should come out clean.

Q: What is Kamut Spelt Pastry and can I use regular pastry instead? A: Kamut and spelt are ancient grain varieties that create a nutty-flavored pastry. Regular shortcrust pastry is a perfect substitute if you can’t find or make the specialty pastry.

Q: Can I freeze this tart? A: Yes, you can freeze the baked tart for up to 1 month. Thaw overnight in the refrigerator and reheat in a 325°F (165°C) oven until warmed through.

Q: What can I serve with this tart? A: This tart pairs beautifully with a simple green salad dressed with vinaigrette. For a more substantial meal, add a soup like butternut squash or tomato.

Storage and Make-Ahead Tips

Refrigeration: Store any leftover tart covered in the refrigerator for up to 3 days. The flavors often improve after a day as they have time to meld together.

Freezing: This tart freezes well after baking. Cool completely, then wrap tightly in plastic wrap and aluminum foil. Freeze for up to 1 month. Thaw overnight in the refrigerator before reheating.

Reheating: Warm refrigerated tart in a 325°F (165°C) oven for about 15-20 minutes, or until heated through. Cover loosely with foil if the top starts to brown too much.

Make-ahead components:

• The pastry dough can be made up to 3 days ahead and kept refrigerated
• Sweet potatoes can be roasted a day ahead and refrigerated
• Caramelized onions can be prepared up to a week ahead and kept refrigerated
• The entire tart can be assembled and baked a day ahead, then reheated or served at room temperature

This elegant Sweet Potato and Feta Tart brings together rustic ingredients in a sophisticated presentation that’s perfect for any occasion throughout the year—from casual family dinners to special holiday feasts.