Rinse 300 grams of basmati rice under cold water and place in a saucepan with 600 milliliters of cold water and sea salt flakes to taste. Stir to break up clumps, bring to a boil, cover with a lid, reduce the heat to low, and simmer for 14 minutes undisturbed.
Slice 3 bell peppers in half, remove seeds and pith, and dice into large chunks. Place in a bowl.
Thinly slice 1 medium onion and add to the bowl with the bell peppers. Mix to separate the onion layers.
Mince 4 garlic cloves and 15 grams of ginger to create a paste. Set aside.
Dice 1.4 kilograms of chicken breast into even-sized pieces.
In a mixing bowl, combine 125 milliliters of light soy sauce, 80 milliliters of pineapple juice, 80 grams of honey, 40 milliliters of Worcestershire sauce, 40 milliliters of apple cider vinegar, 40 milliliters of tomato sauce, and 12 grams of cornflour. Whisk to combine and set aside.
Heat 30 milliliters of grapeseed oil in a large pan over high heat. Add the onions and bell peppers, season with sea salt flakes, and sauté for 4 minutes, stirring regularly. Remove from the pan and set aside.
Add another 20 milliliters of grapeseed oil to the pan, and when hot, add the diced chicken along with a pinch of sea salt flakes. Spread the chicken out evenly and sear for 3 minutes on one side. Stir and cook for another 3 minutes. Drain any excess water from the pan if necessary.
Add the garlic and ginger paste to the chicken and cook for 45 seconds, stirring to infuse the flavors.
Return the sautéed vegetables to the pan and cook for another 30-40 seconds to combine flavors.
Whisk the sweet and sour sauce again, then pour it into the pan. Bring to a boil and cook for 2 minutes until the sauce thickens and coats the chicken and vegetables.
Optional: Add a tablespoon of sesame seeds and stir them in.
Fluff the cooked basmati rice with a fork, portion the rice and sweet and sour chicken into meal prep containers, and garnish with spring onions, chili, or more sesame seeds as desired.