Preheat oven to 350°F. Butter 8x8x2-inch baking dish. Place 8 slices bread in bottom of dish.
In a large saute pan cook sausage on medium-high heat until fully cooked, about 7 minutes, breaking it up as it is cooking. Add spinach and sauté until just heated through. Mix in 1 cup cheese and peppers. Spread atop baguette slices in bottom of dish.
Whisk eggs in medium bowl to blend. Add the last 4 ingredients and whisk again. Pour over spinach mixture and stir lightly with fork to distribute evenly. Sprinkle remaining 1/2 cup cheese over. Bake torta until puffed and golden and center is set, about 55 minutes. Remove from oven and let rest 15 minutes before serving.