Preheat oven to 375 degrees Fahrenheit.

Heat olive oil in a large skillet over medium-high heat and add the garlic to cook for one minute.

Add the chicken breasts to the skillet and cook each side until golden brown (about 3-5 minutes per side).

In a separate bowl mix together cream cheese with grated Parmesan or Romano cheese until well combined.

Place the cooked chicken breasts in a greased baking dish and top with the cream cheese mixture.

Bake in preheated oven for 15 minutes or until cheese is melted and golden brown.

Meanwhile, cook penne pasta according to package instructions.

When pasta is done cooking, drain it and add it to the baking dish with chicken and cream cheese mixture.

Top with diced tomatoes and bake for an additional 5-10 minutes or until everything is hot and bubbly.

Serve warm and enjoy!