Creamy Garlic Butter Tuscan Shrimp

Bahan-bahan (4 porsi)

• 2 tablespoons salted butter, (divided)
• 1 tablespoon cooking oil
• 1 pound shrimp (or prawns, tails on or off)
• 1 small yellow onion, (diced)
• 6 cloves garlic (finely diced)
• 1/2 cup white wine, (optional)
• 5 oz sun-dried tomato strips in oil, (drained (reserve 1 teaspoon of the jarred oil for cooking))
• 1 3/4 cups half and half or heavy cream, (SEE NOTES)
• 1 pinch salt, (to taste)
• 1 pinch pepper, (to taste)
• 3 cups baby spinach leaves, (washed)
• 2/3 cup parmesan cheese. (freshly grated)
• 1 teaspoon cornstarch (mixed with 1 tablespoon of water (optional))
• 2 teaspoons dried Italian herbs
• 1 tablespoon fresh parsley, (chopped)