Cut the spinach into bite-sized pieces and slice the garlic thinly. Remove seeds from the chili pepper and slice it into rings.

Boil water in a pot and cook spaghetti according to package instructions. Add spinach to the pot 2 minutes before the spaghetti finishes cooking. Drain well.

Heat olive oil and garlic in a frying pan over low heat until fragrant. Add shrimp and chili pepper, cooking until shrimp turns white and is fully cooked.