Heat olive oil in a large cast iron skillet over medium-high heat. Add the sliced sausage and cook for 4-5 minutes, stirring occasionally, until lightly browned on the edges.
Add diced onion and minced garlic to the cozy sausage skillet weeknight, stirring constantly for about 2 minutes until fragrant and the onion begins softening. This aromatic base builds deep flavor throughout your entire dish.
Pour in chicken broth and add diced potatoes, red bell pepper, and mushrooms. Stir in thyme, paprika, salt, and black pepper, mixing until the seasonings distribute evenly. Bring to a simmer and reduce heat to medium.
Let the heartwarming slow family meal cook for 15-18 minutes without stirring, allowing potatoes to become tender and absorb the savory broth flavors. The vegetables should be fork-tender but not mushy.
Gently fold in fresh spinach and cook for 2-3 minutes until wilted and bright green. Taste and adjust seasonings as needed before serving directly from the skillet.
Garnish with fresh chopped parsley for color and brightness. Serve immediately while the sausage skillet dinner is still steaming hot and aromatic.