Heat a saute pan or skillet over medium-high heat. Add butter and then zucchini, carrots and bell peppers with some salt. Saute until softened, 5 to 6 minutes.
Next add tomatoes (both crushed and diced), stock and red pepper flakes (start with a small amount and increase if you're worried about heat). Bring to a simmer. Simmer until sauce thickens slightly, 2 to 3 minutes.
Add shrimp with marinade and stir to combine. Cook until shrimp are pink and opaque, another 4 to 6 minutes depending on the size of the shrimp. Season with some salt and pepper.
Divide shrimp and sauce between serving bowls with cilantro on top and lemon wedges on the side. Enjoy!