Creamy Cajun Shrimp Pasta

Shrimp, large raw

large handful Baby spinach

large cloves Garlic

Red onion, small

Tomatoes, fire-roasted

Chicken or vegetable stock

All-purpose flour

Cajun seasoning, homemade or store-bought

Salt and freshly-cracked black pepper

Olive oil

Milk

Olive oil or butter

Parmesan cheese