Preheat oven to 375F and grease a 10inch cast iron skillet. Alternatively use a 9x13 dish.
Chop and dice all veggies. In a large dutch oven or sauce pan, heat butter over medium-high heat until melted. Add in onions, carrots, celery, and potatoes and cook for 7-8 minutes, until veggies have began to soften.
Once softened slightly, add in onion powder, thyme, salt, and pepper. Then sprinkle on flour, stir, and cook an additional minute.
Slowly add in almond milk and chicken stock, scraping bits off the bottom of the dish. Add in chicken and peas and bring to a simmer. Let simmer 2-3 minutes, mixture should be thickening up. Turn off heat.
In a large bowl, mix together flour, baking powder, baking soda, and salt. Add in cubed butter and using your hands or a pastry cutter, blend butter into flour until fine crumbles.
In a separate small bowl, whisk together yogurt, milk, egg, and honey. Pour into flour and stir until dough forms, don't over-mix.
Pour chicken pot pie filling into a skillet. Using a large cookie scoop, scoop biscuit dough onto filling. This should make 6 large biscuits.
Place a baking sheet under skillet and bake for 28-30 minutes or until biscuits are golden brown. It may bubble over a little bit.
Let cool 15 minutes before serving.