Wrap the corn tortillas in a damp paper towel. Microwave for 45-60 seconds to soften. This helps prevent them from cracking. Make sure the tortillas are soft and pliable so they don't crack when they are filled.
Spray a baking sheet with cooking spray or brush with olive oil. Scoop the filling into one side of the taco ( about 1-2 rounded tablespoons depending on the size of the tortilla) and press down to seal. Repeat with the remaining tacos, placing them in a single layer on the baking sheet. Spray the tacos with cooking spray or brush them with oil.
Bake for 16-20 minutes, flipping the tacos after 8-10 minutes when the bottom side looks browned and crispy. Add toppings like shredded lettuce, onions, tomatoes, salsa, avocado, cheese, or sour cream.