Cook sausage in a skillet, breaking up as it cooks.  Drain of any grease and set aside.

In a large pan, add olive oil and garlic. Cook over medium heat only until it begins to sizzle.  Add prepared tomatoes, salt and pepper to taste. Add butter and stir until melted.  Remove from heat.

In a large pot of salted boiling water, cook gnocchi until they float to the top.  Spoon out and put into tomato mixture.  Spoon into individual gratin dishes or one large casserole dish.  Place under broiler and cook for about 5 minutes or until gnocchi is beginning to brown and the sausage is beginning to crisp.  Remove from oven and serve.