Spicy Chicken Fried Rice

butter (divided)

medium carrots (peeled and diced)

medium white onion (diced)

frozen peas

garlic (minced)

fresh ginger (minced)

salt and pepper

eggs (whisked)

cooked and chilled rice (I prefer jasmine rice)

cubed cooked chicken (about 1 lb chicken breasts)

fish sauce (or soy sauce)

toasted sesame oil (or more to taste)

sriracha (or more/less to taste)

chilis (optional)

green onions (thinly sliced)