1. Preheat your oven to 200°C.

2. Place the cod fillets on a baking sheet lined with parchment paper. Season both sides of the fillets with salt and pepper.

3. In a small bowl, mix together the minced garlic and olive oil. Drizzle this mixture over the cod fillets.

4. Arrange the trimmed asparagus around the cod fillets on the baking sheet. Drizzle some olive oil over the asparagus and season with salt and pepper.

5. Place a few slices of lemon on top of each cod fillet.

6. Bake in the preheated oven for about 12-15 minutes, or until the cod is cooked through and flakes easily with a fork.

7. Once cooked, remove from the oven and garnish with fresh parsley (optional).

8. Serve hot and enjoy your delicious keto-friendly Baked Cod with Asparagus!

Note: Feel free to adjust the seasoning according to your taste preferences. Additionally, you can add other keto-friendly spices or herbs to enhance the flavor if desired.