Position oven rack on lowest shelf and preheat to 425 degrees F. Lightly oil a 17- by 14-inch heavy baking sheet (without sides).
In a medium skillet, cook sausage until browned. Add beans, garlic, broth, and 1 teaspoon oil to a food processor, pulse until coarsely chopped. Season with salt and pepper.
Dust pizza dough with flour. Use hands to roll pizza dough onto baking sheet.
Spread bean puree over dough, leaving a 1" border around edge. Top puree with tomatoes and onion, then sprinkle with rosemary, goat cheese and Mozzarella.
Season with salt and pepper.
Bake pizza 12-15 minutes until crust is crisp and cheese is bubbly. Remove from oven. Toss greens with remaining 1/2 teaspoon oil, add salt and pepper to taste and sprinkle over pizza. Cut and enjoy!
*Always cook sausage to internal temperature of 160 degrees F