Preheat oven to 400 F, and grab a broiler safe baking sheet or skillet large enough to fit all the salmon in. Arrange the top rack of your oven so it's 6 inches below the bottom of your broiler.
Bring balsamic vinegar to a boil in a small saucepan. As soon as it boils, reduce it to a simmer (it can burn if boiled too long). Simmer until the liquid has reduced by half, about 12 minutes. Remove from heat and stir in the honey. Your reduction should coat the back of a spoon, if it's thinner, continue to reduce until it does.
While the balsamic reduces, pat salmon dry and season with salt and pepper. Place on baking sheet, and cover the salmon with a sheet of parchment paper. Bake in the oven for 15-18 minutes, until the salmon is cooked through.Option to broil the salmon: Crank oven to broil, remove baking sheet from the oven, remove and discard the parchment paper on top, and brush the top of your fish with olive oil. Broil until the top of your salmon becomes lightly golden.
Allow salmon to cool slightly, then top with tomatoes, basil, and a generous drizzle of balsamic glaze before serving. Enjoy!
Notes
Salmon skin on or skinless. I prefer skinless, as this cooking method won't crisp the skin. Feel free to use whatever you prefer.
Salmon wild vs. farmed. We always purchase wild salmon, due to the lower level of contaminants.
Sweeter. Most people on keto don't eat honey, it's up to you if it works with your eating plan/goals (honey adds 8.5 g of sugar per serving). Feel free to substitute the honey for your sweetener of choice, I would use keto maple syrup, Birch Blenders is my favorite product.
Toppings. Feel free to adjust the bruschetta topping to your liking, such as adding avocado, parmesan, etc.
Leftovers will store in the fridge for 3-4 days. Store balsamic reduction and tomatoes/basil separately from the fish, so the fish can be reheated before serving.