Bring a large pot of water to the boil. Once boiling, add in 2 teaspoons salt and the potatoes. Cook the potatoes until they can be easily pierced by a fork. Small ones should take around 20 to 25 minutes. (The larger ones might take around 30 minutes.)
Preheat the oven to 400 degrees F.
Drain the potatoes and let them stand and fully dry for a few minutes. Meanwhile, prepare the other ingredients: coin the sausage, chop the broccoli into florets, and remove the stem and seeds from the pepper and then coarsely chop. Add the coined sausage, broccoli florets, and pepper to one half of a large sheet pan. On the other half of the sheet pan add the potatoes.
Using a large fork or potato masher, gently press into the potatoes being careful to keep them in one place and to not fully mash them.
Next prepare the seasoning mix. Combine the dried basil, dried oregano, dried parsley, garlic powder, onion powder, dried thyme, salt, and pepper. (I use about 1/8 teaspoon pepper and 1/2 teaspoon salt). Stir to combine.
Combine the 3 tablespoons melted butter, garlic, and 2 teaspoons of the seasoning mix in a small bowl. Stir and then divide evenly on top of each smashed potato. Toss the remaining seasoning mix and 2 and 1/2 tablespoons olive oil with the sausage and veggies. Drizzle the last 1 tablespoon olive oil evenly over the potatoes. Toss the sausage and veggies together.
Bake for 25-30 minutes or until veggies are tender and roasted and the potatoes are crispy. If desired, broil for 2-3 minutes (watching carefully) on High.
Sprinkle with finely chopped parsley and parmesan cheese. Enjoy with sauce if desired.