Step-by-Step Instructions
1. Cook the shrimp.
Heat 2 tablespoons butter in a skillet over medium heat.
Add shrimp and cook until just pink, about 2 minutes per side.
Remove and set aside.
2. Build the base.
Melt remaining butter in a large pot.
Add onion and celery; sauté until softened, about 5 minutes.
Stir in garlic and tomato paste; cook 1 minute until fragrant.
3. Make the roux.
Sprinkle flour over vegetables and stir constantly for 1–2 minutes.
