Preheat oven to 450. In a large skillet, combine sausage and ground beef with onion. Brown, drain. Pour in tomatoes and chiles. Stir to combine and cook for 2 minutes. Remove and cool slightly.

In a bowl, combine the ricotta, mozzarella and monterrey cheese, and egg. Add salt and pepper to taste. Add the cooled meat mixture to the cheese mixture and stir gently to combine. Divide the pizza dough into 8 equal size balls. With a rolling pin, roll each ball into a 6-inch circle.

Place a spoonful of the meat/cheese mixture in the middle of each circle. Fold half of the circle over the other half, gently pressing to slightly spread and flatten the filling inside. Press a fork along the edge to seal closed. Brush the calzones with olive oil.

Bake for 12-15 minutes until golden brown.