Boil pasta in generously salted water that tastes like the sea. Cook until al dente, according to package instructions.Do not throw out the water, but remove pasta. Set aside pasta water for later use. In a large pan over medium-high heat, add garlic and sauté for 3 minutes. Add Italian sausage and break up meat in pan.
When sausage just starts to brown, add Brussels sprouts and lemon, and turn heat up to high. Sauté for about 5-7 minutes, until Brussels sprouts soften and meat has fully browned. Add more olive oil if needed.
Reduce heat to medium-high, and stir in cream and milk. Continue stirring until cheese is dissolved.
Add pasta and salt and pepper, to taste. Taste sauce, then add more cream and cheese if you want your dish to be saucier. Serve when hot!
