Season both sides of the chicken with salt, pepper, and any seasoning blend. Set aside.
In a wide, shallow skillet, heat one tablespoon of the oil over medium-high heat. Add the chicken tenderloins and sauté on both sides until just cooked through, approximately 4 minutes per side. (Cook time may vary according to your heat, pan, or size of tenderloins. The chicken is cooked when a digital thermometer reads 165 degrees when inserted into the thickest part of the chicken.)
Remove the chicken from the pan and place them in a small bowl and cover with foil to keep warm while you prepare the rest of the dish.
Maintain your heat and add the remaining tablespoon of oil to the pan. Add the carrots, onion, and bell pepper. Add a pinch of salt and pepper and sauté until the vegetables are just beginning to soften. Add the garlic and sauté for 30 seconds.
Add the rice, stock, peas, butter, and any liquid released from the chicken in the bowl. Taste the broth and adjust any seasonings as desired. (*You should have cooked your chicken tenderloins until cooked through. If you did not fully cook them, you'll need to simmer your stock before tasting for food safety reasons.) Make sure the broth is flavorful since your rice will be soaking up this liquid.
Bring the mixture up to a low, gentle simmer.
Cover the pan with a tight-fitting lid and cook for 15 to 18 minutes or until the rice is cooked. If you have liquid still left in your pan after the rice has fully cooked, take the lid off and allow the liquid to evaporate.
Stir your rice and vegetables, then place the chicken tenderloins on top of the rice for a few minutes to warm up.
Sprinkle with parsley and serve warm.