Bring a large pot of salted water to a boil. Add the DeLallo whole wheat linguini and cook according to package instructions until al dente. Reserve 1/2 cup of the pasta water, then drain the pasta and set aside.
In a large skillet, heat 1 teaspoon of olive oil over medium heat. Add the chopped onion and sauté until it becomes translucent, about 3-4 minutes. Add the smashed garlic and cook for an additional minute, stirring frequently to prevent burning.
Remove the casing from the hot Italian chicken sausage and crumble it into the skillet. Cook, stirring occasionally, until the sausage is browned and cooked through, about 5-7 minutes. Season with kosher salt and black pepper to taste.
Stir in the diced roasted peppers, crushed tomatoes, and low-sodium chicken broth. Bring the mixture to a simmer and let it cook for about 5 minutes, allowing the flavors to meld.
Add the cooked linguini to the skillet, tossing it with the sauce. If the mixture seems dry, add some reserved pasta water, a little at a time, until you reach your desired consistency.
Remove the skillet from heat and stir in the grated Pecorino Romano and fresh chopped parsley. Give it a final toss to combine everything deliciously.