Prepare the rice noodles according to package instructions, drain, and set aside.
Heat the olive oil in a large skillet over medium-high heat until shimmering.
Add the cubed chicken breast, sea salt, black pepper, and garlic powder to the pan.
Sauté the chicken for 5-7 minutes until browned and cooked through.
Add the sliced red bell peppers to the skillet and cook for an additional 3 minutes.
Reduce the heat to low, then add the cooked rice noodles and fresh spinach, tossing until the spinach is wilted.
Stir in the Greek yogurt and water to create a light, creamy base.
Sprinkle the shredded mozzarella over the mixture and toss continuously until the cheese is melted and the sauce is silky.