Adjust oven rack to upper third of oven and preheat oven to 400℉. In a large oven safe skillet, melt butter over medium low heat. Add onions and carrots and sauté for about 5 minutes until they start to soften. Add garlic and sauté for another 2 minutes. Sprinkle in flour stirring constantly for about a minute. Slowly whisk in chicken broth followed by heavy cream. Increase heat and bring to a simmer until pot pie filling mixture starts to thicken.
Once thickened, stir in chicken, chicken bouillon, poultry seasoning, salt, and pepper. Taste and adjust seasoning as needed. Stir in frozen peas.
In a medium sized bowl, combine baking mix, milk, vegetable oil, cheese, and 1/8 teaspoon garlic powder. Spoon biscuit dough into pot pie filling making 9 biscuits. Bake for about 20 minutes or until biscuits are golden brown and the filling is bubbly.
While pot pie is baking, combine melted butter with garlic powder. Brush warm garlic butter over biscuits and sprinkle with fresh parsley.