Step 1

Preheat the oven to 400ºF, or use a large nonstick skillet.

Step 2

Brush one side of the soft tortillas with oil. Flip them over, oil-side down onto a nonstick baking sheet.

Step 3

Place the walnut meat on one-half side of the tortillas. Fold the other side over to cover the filling. Place a second baking sheet on top of the folded tacos to hold the tops down for baking.

Step 4

Bake the tortillas on the middle rack. Remove the top baking sheet after 10 minutes, and flip the tortillas over. Bake for about 10 minutes more, or until the desired crispiness.

Step 5

To use a nonstick skillet: Heat a drizzle of oil in a large nonstick skillet over medium-high heat (optional). Place the folded tortillas in the skillet, leaving space in between for flipping. Use a spatula to press the tops down and cook for about 7 minutes, or until the bottoms are crispy. Then flip them over and cook for about 5 minutes more, or until both sides are crispy.

Step 6

Make the Avocado Crema, if using. Transfer the avocado, yogurt, garlic, jalapeño, cilantro, and lime juice to the canister of a food processor. Blend until smooth, adding olive oil or water as needed until the desired consistency. Season with salt, pepper, and more lime juice to taste.