Step 1: Preheat the Oven
1. Preheat Oven: Preheat your oven to 400°F (200°C).

Step 2: Prepare the Salmon and Vegetables
1. Line Baking Sheet: Line a large baking sheet with parchment paper or aluminum foil for easy cleanup.
2. Arrange Salmon: Place the salmon fillets on one side of the baking sheet.
3. Season Salmon: Drizzle the salmon with olive oil and sprinkle everything bagel seasoning evenly over the top. Add salt and pepper to taste. Place lemon slices on top of the salmon.

Step 3: Add the Vegetables
1. Prepare Vegetables: On the other side of the baking sheet, arrange the trimmed asparagus or green beans.
2. Season Vegetables: Drizzle the vegetables with olive oil and season with salt and pepper. Toss to coat evenly.

Step 4: Bake
1. Bake: Place the baking sheet in the preheated oven and bake for 15-20 minutes, or until the salmon is cooked through and flakes easily with a fork, and the vegetables are tender.

Step 5: Serve
1. Garnish: Remove from the oven and garnish with fresh parsley or dill if desired.
2. Enjoy: Serve immediately and enjoy your delicious everything bagel sheet pan salmon!