Preheat the oven to 400 °F. Line a large sheet pan with parchment paper or foil.
Place the cubed red potatoes and baby carrots on the sheet pan. Pour 2 tablespoons olive oil and half of the spice mix, and garlic on top. Toss to combine and roast in the oven for 20 minutes.
Meanwhile, prepare the green beans by trimming the ends. Thinly slice the onion. Slice the chicken sausage into coins.
Remove the potatoes and carrots from the oven and using a spatula push them to one side of the pan. On the other side add in the chopped green beans, sliced onion, sausage, and leftover minced garlic. Add the remaining olive oil and remaining seasoning mix. Toss to combine and then toss those ingredients with the potatoes and carrots.
Bake for another 10-13 minutes or until veggies are roasted through.
Serve immediately, or prep in five containers for the work week.