Mac and Cheese with Herbed Tomatoes

Name: Mac and Cheese with Herbed Tomatoes
Ingredients: 6 tbsp unsalted butter, divided, plus more for greasing; 3/4 cup whole wheat panko; 1/2 cup plus 2 tbsp. grated parmesan; 1 clove of garlic, minced; 1 small onion, diced; 1/4 cup all-purpose flour; 4 cups milk, heated; tsp freshly grated nutmeg; pinch of cayenne; kosher salt and freshly ground black pepper, to taste; 8 oz sharp Cheddar cheese, grated; 8 oz gruyere cheese, grated; 4 oz diced speck, prosciutto, or ham; 1 lb penne rigate, cooked al dente; 4 plum tomatoes, halved; 2 tsp olive oil; 2 tsp herbes de Provence