How to Make It
Heat a large skillet over medium-high. Add sausage and cook, stirring often, until browned in places, about 4 minutes. Add bell pepper and garlic and cook, stirring often, until vegetables soften, about 3 minutes. Add tomatoes and salt and cook, stirring often, until tomatoes burst, about 4 minutes. Add butter and cook, stirring constantly, until melted. Cover to keep warm.
Meanwhile, bring 2⅔ cups water to a boil in a small saucepan. Whisk in grits and cook, whisking often, until tender, 8 to 10 minutes. Add cheese and Old Bay and cook, whisking constantly, until cheese melts.
Serve grits topped with andouille mixture and parsley.