1. Heat oven to 400 degrees . Toss Brussels sprouts with olive oil, 1/4 teaspoon of the salt and 1/8 teaspoon of the pepper. Place on a baking sheet and roast at 400 degrees for 20 to 25 minutes, flipping sprouts once.
2. Place salmon skin-side down on a different baking sheet lined with nonstick foil. Season with remaining 1/8 teaspoon each salt and pepper. Spread mustard on top. Add to 400 degrees oven during last 15 minutes of roasting Brussels sprouts.Bacon Orzo
3. Meanwhile, cook orzo in lightly salted boiling water for 8 minutes. Drain, reserving 1 cup of the cooking liquid.
4. In a large saute pan, cook bacon over medium heat for 8 minutes; remove with a slotted spoon. In same pan, add onion to bacon fat. Cook until softened, about 3 minutes. Stir in lemon juice, mustard and 1/2 cup of the reserved pasta water. Bring to a boil and simmer 1 to 2 minutes to thicken. Stir in orzo and bacon. Add more pasta water, if desired.