From the Milwaukee Journal Sentinel Jan S. requested the recipe for an onion soup served at Eddie Martini's, 8612 W. Watertown Plank Road, Wauwatosa. She wrote: "My husband and I had their baked burgundy onion soup and fell in love with it. It is definitely a keeper." Jason Tofte, executive chef, sent the recipe. He said it's been on the restaurant's menu since it opened in 1995 and that it's a favorite with customers.
In a heavy saucepan over medium-high heat, melt butter. When butter starts to bubble, add onions and cook until very brown, at least 15 minutes. Add tomato paste and wine. Cook until only a trace of wine remains, about 10 minutes.
Add stock and pepper, and then simmer 20 minutes. Add salt to taste.
Preheat broiler.
Divide soup between 6 warmed, ovenproof bowls. Top each portion with a slice of bread then cover with cheese, bringing it to the edges of the bowl to seal. There should be at least 3/8-inch head-space a top of the bowl so the soup does not bubble over.
Set bowls on a cookie sheet with sides and put in broiler. Broil until cheese melts and becomes golde.
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