Instructions: Bring a large pot of water to boil; cook pasta until al dente.

While pasta is cooking, in med saucepan, melt 2 T of the margarine. Remove from heat; add flour and stir until blended in. Whisk in stock and milk, stirring over med heat until mixture comes to a boil and thickens. Reduce heat to low. Stir in cheeses and seasonings. Continue stirring until cheese is melted. Remove from heat and set aside.

In a large skillet, melt remaining 1 T margarine. Add remaining ingredients. Cook vegetables, stirring constantly, for about 5 minutes, until tender/crisp. Reduce heat to low. When noodles are done, drain well.

Toss with vegetables; stir in cheese sauce. Garnish with scallion curls.

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