01 -
Set your oven to 350°F. Cook the penne in a big pot of salted boiling water until it’s just firm to the bite (al dente). Drain, then put the penne back into the same pot.
02 -
Heat 1 spoonful of butter in a wide, oven-safe pan over medium heat. Toss in garlic, 2 tablespoons of parsley, shrimp, and a pinch of salt. Cook the shrimp until they turn pink, about 2 minutes for each side, then remove them from the pan and set aside, keeping the skillet juices.
03 -
Toss the remaining butter into the same pan and let it melt. Sprinkle in the flour and whisk it around until it turns light brown, which takes 1-2 minutes. Slowly pour in the milk along with the chicken broth and let everything gently simmer.
04 -
Mix in the mozzarella (just 3/4 cup) and 1/4 cup of Parmesan, letting it melt into a rich, creamy sauce. Sprinkle in some salt and freshly ground pepper as you like.
05 -
Put the shrimp back in the skillet, then stir in the chopped tomatoes and cooked pasta. Mix it all together well. If it seems too thick, you can stir in a quick splash of milk to thin it out.
06 -
Evenly shake the last bit of Parmesan (2 tablespoons) and mozzarella (1/4 cup) over the top.
07 -
Pop it into the oven for about 5-7 minutes, until the cheese melts and gets all bubbly. For an extra pop of color, broil it for a few minutes until the top gets lightly golden. Keep an eye on it to avoid burning!
08 -
Scatter the remaining parsley on top and serve while warm.