Preheat: Heat your oven to 400°F (200°C). Line a large baking sheet with parchment paper.
Prep the Base: In a bowl, toss the cherry tomatoes and chopped onions with olive oil, salt, and pepper. Spread them across the baking sheet.
Create the Glaze: In the same bowl, whisk together the olive oil, lemon juice, minced garlic, balsamic vinegar, honey, and smoked paprika.
Assemble: Place the 4 salmon portions on the sheet pan. Brush the balsamic glaze generously over each fillet.
Add the Herbs: Place the fresh thyme sprigs over the salmon and vegetables.
Roast: Bake for 15-20 minutes until the salmon is flaky and the tomatoes are blistered.
Serve: Serve warm with an extra squeeze of fresh lemon and a side of your favorite whole grain.