The Guido Burger

This is another one of those things that Laura and I made to put a spin on spaghetti. We both love a good meat sauce and we both love meatball sandwiches. Why not put those on a freaking burger!!
(salivation begins, the heavens open and angels rejoice in song)
This one is going down as The Guido. It's a beef and Italian sausage mixed burger with tomato sauce, and provalone cheese. It's simple, easy, and tastes like an Italian restaurant had a love child with a burger dive. Here's your list of ingredients:

1 lb of  Ground beef
1 lb of Italian Sausage (not in casings)
1 green Pepper (diced)
6 large mushrooms (diced)
1 onion (diced fine)
1 tbsp Italian Seasoning mix
1 tsp garlic,
2 slices of crumbled white toast
1 egg
8 slices of Bread (toasted)
1 Jar of spaghetti sauce (your choice)
Sliced provalone Cheese

Combine beef, sausage (uncased), mushrooms, green pepper, onion, garlic, seasoning, crumbled toast, and egg into a bowl and mix thoroughly with your hands. Form into 4 (yes they are going to be large, the fat cooks out)patties and place them in a hot skillet. Flip after about 6 minutes. Cook an additional 4-5 minutes and flip. Place a slice of provolone on each burger and cover the pan with a mixing bowl to allow a steam fry to melt the cheese. Remove from heat and lay out toast. Cover each piece of toast with tomato Sauce and place burgers on 4 slices using the other slices as cover.
There you have it. Not too complicated, but the flavor that comes out of these things is freaking killer. Have fun everyone.