Preheat your oven to 375°F/190⁰C.
Dice onion, set aside.
Season chicken with salt and pepper. Heat oil in skillet over medium-high heat.
Sear chicken, skin-side down, until golden brown, about 5 minutes per side. Remove chicken from pan, set aside.
Turn heat to medium, add onions to pan, sauté for 5 minutes, or until translucent. Press in garlic, sauté for another minute,until fragrant.
Pour in rice, stirring to incorporate ingredients for one minute. Pour in broth and almond milk, stirring to combine. Add chicken back to skillet,and bring to a simmer. Cover and bake for approximately 40 minutes, or until liquid is absorbed and chicken is cooked through.
Meanwhile, grate your cheeses.
Remove skillet from oven, and set chicken aside. Add cheddar and Parmesan cheeses to the rice, stirring lightly to combine. Transfer chicken back to the pan, top with sliced almonds and parsley for garnish. Serve immediately.