Makes 6 to 8 servings
In medium bowl, beat together eggs, water, chili powder and curnin until well blended. In 10-inch skillet over medium heat, melt butter. Pour in egg mixture. Cover and cook over low heat until eggs are almost set, about 7 to 9 minutes. Set aside.
Place a tortilla in bottom of lightly greased 9 or 10-inch springform pan. Spread with 1/2 of the beans and 1 cup of the Cheddar cheese. Top with another tortilla, ricotta cheese, and 1/2 cup of the salsa. Top with another tortilla, the reserved cooked egg and 1/2 cup of the salsa. Top with another tortilla, the remaining beans, the zucchini, and 1/2 cup of the Cheddar cheese. Top with the remaining tortilla.
Bake in preheated 350°F oven 20 minutes. Remove from oven and top with remaining salsa and Cheddar cheese. Bake 10 minutes more. Let stand 5 to 10 minutes. Remove rim of pan and cut into wedges to serve. Garnish with cilantro sprigs, if desired.