Thaw shrimp, if frozen. You can do this by placing the shrimp under cool running water for no more than 20 minutes
Rinse shrimp; pat dry with paper towels.
Place shrimp in a small bowl.
Sprinkle shrimp with jerk seasoning; toss to coat.
Set shrimp aside.
If it is going to take some time, place in refrigerator to follow food safety guidelines.
In a large skillet, heat 1 tablespoon of the olive oil over medium-high heat.
Add garlic, red onion, and shrimp.
Cook in the hot oil for 2 to 3 minutes or until shrimp is opaque
Add spinach, cook and stir about 1 minute or until spinach is just wilted. Remember, the more wilted the spinach the less vitamins and nutrients you will receive as the heat removes them.
Transfer to a serving platter.
Place tomatoes on top of dish to garnish and add flavor.