Christmas morning frittata

Name: Christmas morning frittata
Ingredients: 2 cups cubed country-style bread; 3-4 tablespoons olive oil; 2 medium zucchinis, sliced into 1/4 inch thick rounds; 2 medium summer squash, sliced into 1/4 inch thick rounds; 1 each red, yellow, and orange bell pepper, seeded and thinly sliced; 1 large yellow onion, thinly sliced; 3 cloves garlic, minced; 8 ounces cream cheese; 8 large eggs; 1/4 cup cream; 2 cups grated Gruyere cheese; 2 teaspoons salt; 2 teaspoons freshly ground black pepper