Place a skillet on medium heat, add in sesame oil, 2 cloves of minced garlic and grated ginger. Cook for a few min until shrimp is cooked through, just until shrimp turns pink. Do not overcook. Once shrimp is done cooking transfer the shrimp to a plate.
Add skillet back on medium heat and add in diced onion and remaining minced garlic. Cook until onions are translucent about 3-5 minutes. Add in frozen veggies and mix. Add in cooked rice and mix until veggies and rice and combined. Add in chopped pineapple.
Stir in soy sauce, oyster sauce, and fresh black pepper. Taste and adjust seasoning as needed.
Add cooked shrimp back in and mix. Add in sriracha and top with sliced scallions and cilantro. Serve and enjoy!