1 tablespoon extra virgin olive oil or sunflower oil
1 small red onion, chopped
1 to 2 garlic cloves, minced
1 to 3 serrano or jalapeño chiles, minced (to taste)
1 pound summer squash, grated
Kernels from 2 ears of corn
1/4 cup cilantro (more to taste)
10 to 12 corn tortillas
About 1 cup cooked tomatillo salsa
3 ounces crumbled queso fresco or feta
Shredded cabbage for topping (optional)