Spray tortillas with olive oil spray and drape over an oven proof bowl or tin foil ball on a baking sheet. Bake at 350 for 15 minutes or until crispy.
Brown meat, breaking into a fine crumble, and drain. Add double taco seasoning but only the recommended amount of water for 1 pkg. or slightly more. Let meat simmer over low heat to absorb seasoning and reduce down.
Melt butter and 1 T olive oil in skillet and add corn. Cook 5 minutes and add onion and mushrooms. Cook 4-5 more minutes. Add squash, season with salt and pepper and a dash or two of balsamic vinegar. Stir well and let simmer to heat through and cook squash.
Place lettuce in the bottom of tortilla bowl. Top with meat, vegetables and cheese. Add toppings of choice and serve. Makes 4 bowls