Heat 2 tablespoons avocado oil on medium high in a large skillet or wok. Add diced onion and frozen vegetables, and sauté until onions are almost translucent, about 3 minutes. Move the vegetables to the side of pan. Crack eggs into pan and scramble with a spatula until cooked through and fully scrambled.
Add 4 cups cooked rice and 4 tablespoons butter. Cook for 5 minutes and stir frequently. Add 4 tablespoons soy sauce and cook 1 additional minute. Pack fried rice firmly into bowls to keep hot.
For the Chicken and Vegetables (Made Simultaneously)
For the chicken: Heat 1 ½ teaspoons sesame oil and 1 tablespoon avocado oil in same skillet or wok used for fried rice. Add chicken, 3 tablespoons soy sauce, 1 tablespoon butter, lemon juice, salt, and pepper to skillet. Cook chicken until it is no longer pink, about 5-7 minutes. Stir only once or twice so chicken will brown.
For the vegetables: In a separate large skillet or wok, heat 1 ½ teaspoons sesame oil and 1 tablespoon avocado oil on medium high heat. Add sliced onion, baby bella mushrooms, zucchini, 1 tablespoon butter, 1 tablespoon soy sauce, salt, and pepper to skillet. Sauté until vegetables are tender, about 6-8 minutes.
For the Mustard Sauce
Lightly toast sesame seeds if desired. (See note.) Blend sesame seeds, dry mustard, 2 teaspoons honey, 4 tablespoons soy sauce, half and half, hot water, and minced garlic in blender.
For the best fried rice: Do not cook rice immediately before making fried rice. Leftover or precooked rice from the store works best.
For mustard sauce: Lightly toasting sesame seeds will enhance the flavor, but it is not necessary. Mustard sauce can be made ahead of time and stored in the refrigerator.
To make grain-free: Substitute rice with cauliflower rice.
Recipe yields approximately 6 servings. Actual number of servings will depend on your preferred portion sizes.Nutritional values shown are general guidelines and reflect information for 1 serving out of 6 using the ingredients listed. Actual macros may vary slightly depending on specific brands and types of ingredients used.To determine the weight of one serving, prepare the recipe as instructed. Weigh the finished recipe, then divide the weight of the finished recipe (not including the weight of the container the food is in) by 6. Result will be the weight of one serving.