Preheat your oven to 400°F (200°C).
In a large skillet over medium-high heat, add the avocado oil and brown the ground beef until it is fully cooked and no longer pink.
Add the diced yellow onion and carrots to the skillet, sautéing for about 5 minutes until the vegetables are tender and aromatic.
Season the mixture with sea salt, black pepper, and fresh thyme leaves, stirring to combine.
In a small bowl, whisk the arrowroot powder into the cold beef bone broth until smooth, then pour the liquid into the skillet.
Simmer the mixture for 2-3 minutes until the gravy has thickened to a glossy consistency, then fold in the frozen peas.
Transfer the beef and vegetable filling into a personal-sized oven-safe ramekin or small baking dish.
Place the puff pastry square over the top of the dish, pressing the edges down to seal, and cut a small slit in the center for steam to escape.
Bake for 15-18 minutes until the pastry is puffed and beautifully golden brown.