Carefully slice your pineapples in half lengthways through the stem.
Next, lay the pineapple halves cut side up onto the cutting board. Using a paring knife, cut around the edges, leaving a 1/4 to 1/2-inch thick edge as shown. This will help you to carve the flesh easier. Scoop out the pineapple flesh, and pour any juice into a small bowl. You should have around 1/4 cup of fresh pineapple juice total from the 2 fruits. Set your pineapple bowls aside.
Remove and discard the tough center from the pineapple flesh. Dice the flesh into cubes and set it aside in a bowl.
Heat 1 tablespoon of your oil in a large skillet over medium-high heat. Add in the shrimp, sea salt, and freshly ground black pepper if desired and saute for 3-5 minutes, or until pink and opaque. Set shrimp aside on a plate.
Meanwhile, add all the sauce ingredients into a small bowl and whisk really well to combine.
In that same preheated skillet, add the rest of the oil and cook your bell pepper together with the red onion for 3-4 minutes. Add in the garden peas and chopped pineapple flesh. Pour in your sauce mixture over the ingredients in the hot skillet. Let it simmer while gently stirring until it reduces a bit.
Return the shrimp into your skillet, and cook for no more than 1 minute, just until the shrimp are heated through.
Spoon your shrimp mixture into your pineapples, garnish with green onions and enjoy!