Add the yum yum sauce ingredients to a bowl and stir until well combined. Set aside.
Cut up the chicken and season it with salt & pepper.
Add the oil and 1 tablespoon of butter to a large skillet over medium-high heat. Let the pan heat up for a few minutes. Cook the chicken for 5 minutes, turning once halfway (I use cooking tongs to make this easy), or until it's just cooked through. Don't overcook, and avoid crowding the pan (you want the chicken to get a little brown on the outside).
Add in the rest of the butter, the garlic, and the soy sauce. Let it bubble for about a minute.
Squeeze some lemon juice over top (up to 1/2 a lemon is good). Serve with rice, yum yum sauce, and optional chopped scallions.
Feel free to taste the yum yum sauce and adjust ingredient quantities to your liking. If you want to add some heat, add in a dash of hot sauce.
If you want to drizzle the yum yum sauce over the dish like I did, you may need to thin it out with a little water. You could serve it in a little bowl for dipping if you prefer.
Make your usual amount of rice for 4 people (I suggest making 1 cup uncooked rice, up to 1.5 cups uncooked rice for hungry people).