4  large eggs
2 cup(s) low-fat milk
1/2 teaspoon(s) hot sauce, such as
3/4 teaspoon(s) salt, divided
1/4 teaspoon(s) freshly ground pepper, divided
3.5 cup(s) cubed stale whole-wheat country bread
1 cup(s) frozen spinach
1 tablespoon(s) extra-virgin olive oil
1 cup(s) chopped onion , (1 medium)
1 cup(s) chopped red bell pepper , (1 small)
4 cup(s) sliced mushrooms, (12 ounces)
1 clove(s) garlic, minced
1 cup(s) grated Gruyere, Emmentaler or Manchego cheese (3 ounces), divided