Cheesy Mushroom and Spinach Bread Pudding

Name: Cheesy Mushroom and Spinach Bread Pudding
Ingredients: 1 tablespoon extra virgin olive oil; 4 eggs; 2 cups leftover crusty bread, cubed; 1 cup mushrooms, sliced; 1/2 onion, diced; 1 clove garlic, minced; 1 tablespoon rosemary, minced; 1/2 cup cooked greens such as spinach or kale, or 1/2 cup drained frozen spinach; 1/4 cup Marsala wine (could sub Sherry); 1 tablespoon fresh marjoram or sage, chopped; 1 tablespoon chives, chopped; 1.5 cups grated cheese (any combination of cheddar, gruyere, and/or parmesan); 2 pieces bacon, cooked until crisp, drained on paper towels and crumbled (optional)