Savory Dutch Baby Pancakes

Name: Savory Dutch Baby Pancakes
Ingredients: 4 eggs; 1/2 cup milk; 1/2 cup flour; 2 Tbsp Parmesan cheese, grated; 1 scallion, white & light green parts thinly sliced; 2 Tbsp parsley, roughly chopped; 1 Tsp fresh thyme leaves; 1/8 Tsp EACH salt & pepper; 4 Tbsp unsalted butter; 5 tsp oil, divided; 150 gm onion, chopped; 270 gm or 8-inch zucchini, julienned; 200 gm cremini mushrooms, sliced; 375 gm Italian chicken sausage, sliced; 2 cups vegetable broth; 3 Tbsp flour; 1 tsp SMOKY RANCHERO spice (I prefer the Club House brand); grated cheese for garnish; fresh thyme for garnish