Mix Cheese, Onion, and milk powder together to make a filling. * 2 small cans tomato paste * 2 tablespoons oil * 1 Onion, diced * 3/4 cup water * 1 teaspoon garlic powder * 1+1/2 teaspoons chili powder (adjust to taste) * 1 teaspoon salt * 1/2 teaspoon Cayenne * 20 tortilla shells