""I've also made this savory soup in a slow cooker for a fuss-free meal. It cooks on low for 3 to 4 hours." Denise Hruz, Germantown, WI..."
INGREDIENTS
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1/4 cup butter, cubed
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4 large onions, sliced
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1/4 cup sugar
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2 tablespoons all-purpose flour
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2 cans (14-1/2 ounces each) reduced-sodium beef broth
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2 cans (10-1/2 ounces each) condensed French onion soup
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2 cups water
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1/2 cup grated Parmesan cheese
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9 slices French bread (1/2 inch thick)
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9 tablespoons shredded part-skim mozzarella cheese
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Chopped fresh thyme, optional