Preheat oven to 350 degrees.

Take note if using corn tortillas-they tend to break easily. One thing I do (and it is an extra time step but makes a difference), is gently warm each tortilla in some heated coconut oil, then layer among two pieces of aluminum foil to keep warm and flexible for when it's time to pour in the filling, roll and set into baking dish.

Chop and measure zucchini, yellow squash, onion and cilantro. Set aside.

Shred cheese, set aside.

Melt 1 T butter in skillet. Add zucchini, squash and onion. Saute until just about al dente as it will finish cooking to get soft in the oven.

Add 1 cup corn, chiles and cilantro.

In a saucepan, melt 3 T butter, whisk in chili powder, flour and cumin. Gradually whisk in 2 1/2 cups milk until bubbly. Add 1 1/2 cups cheese, whisk until melted.

Spread 1/4 cup sauce into 13x9x2 glass baking dish.

Mix 3/4 cup sauce into the veggies as this becomes the filling.

Open corn tortillas, putting preferred amount of filling into each tortilla, roll, put in baking dish.

Cover with remaining sauce, 1/4 cup corn and 1/2 cup cheese.

Bake for 15 minutes or until soft.