Preheat the oven to broil.
Start by mixing the first 10 ingredients for the sauce and set aside.
Then chop the onions and peppers.
Next, place the peppers and salmon on one sheet pan and drizzle with 1/3 of the sauce
Place the asparagus and onions on a second sheet pan, drizzle with 1/3 of the sauce.
Toss the vegetables in both pans by hand to coat well with sauce.
Start in center rack of oven and broil for 8 minutes.
Then move to top rack and broil for 10 minutes or until the salmon is slightly caramelized and the veggies have some char marks.
Remove from the oven and serve with the remaining sauce, if desired.