Season the salmon fillets with salt and pepper on both sides.
Heat olive oil in a small saucepan over medium heat. Add minced garlic and sauté until fragrant, about 1 minute.
Add balsamic vinegar, honey, and Dijon mustard to the pan. Stir to combine and bring the mixture to a simmer. Reduce heat and let it simmer until the sauce thickens slightly, about 4-5 minutes.
Place the salmon fillets on a baking sheet lined with foil. Brush the fillets generously with the balsamic glaze.
Bake in the preheated oven for about 12-15 minutes, or until the salmon is cooked through and flakes easily with a fork.
Serve the salmon hot, drizzled with any remaining glaze from the pan.