To prepare the base, combine the matchstick carrots, matchstick radishes, rice vinegar, sugar, and salt in a large bowl. Let stand at room temperature for one hour, gently stirring the mixture every 15–20 minutes. Follow package directions to cook the rice. Set aside when finished.
Zest limes with a zester to get 1/4 teaspoon zest. Juice the limes using a citrus juicer to get 3 tablespoons lime juice. To make the sauce, whisk mayo, lime juice, lime zest, and sriracha in a bowl until smooth. Cover and chill in the fridge.
Add the sesame oil to a large pan. Heat to medium-high, then add in the pork, salt, and pepper. Break the pork into small pieces with a spoon until cooked through, about 7–9 minutes. Stir in the green onions and cook for another 2–3 minutes, stirring constantly. Add the garlic and stir for 1 minute. Stir in the fish sauce, sriracha, and sugar. Remove from heat and stir in the chopped basil.
Divide the cooked rice evenly among 4 bowls. Top rice in each bowl with pork. Using a slotted spoon, add pickled veggies to each bowl, then add even amounts of matchstick cucumber to the bowls. Finish off the bowls with desired amounts of sauce and optional toppings.
Video
Notes
Storage: Store leftovers in airtight containers in the fridge for up to 3 days. Keep sauce separate.