Preheat the oven to 350°F (175°C).
In a large pot, boil water with a pinch of salt. Cook egg noodles until al dente, 7 to 9 minutes.
Meanwhile, cook bacon in a large skillet over medium-high heat until crispy, about 10 minutes. Drain, crumble, and set aside.
In the same skillet, heat olive oil on medium-high. Add cubed chicken, lemon-pepper seasoning, and cook until browned on all sides, 5 to 7 minutes. Remove with a slotted spoon and place in a 9x13-inch baking dish.
In a bowl, mix together half of the crumbled bacon, sour cream, cream of chicken soup, milk, and ranch dressing mix until combined. Pour this mixture over the chicken in the dish, then add cooked egg noodles and stir gently.
Top with remaining bacon, Colby-Monterey Jack cheese, and green onions.
Bake in the preheated oven for 30 minutes or until the cheese is melted and the chicken is fully cooked.
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