Mexican Rollups

This recipe has become a Christmas favorite to take to parties.

8 oz. cream cheese
1 large onion, chopped
8 oz. sour cream
1 1/4 oz. pkg. taco seasoning
8 oz. cheddar cheese, shredded
4 1/2 oz. can chopped green chilies, drained
2 tomatoes, chopped and drained
10 flour tortillas

Combine first four ingredients until smooth. Fold in cheese, chilies, and tomatoes, blending well. Spread mixture on tortillas, then roll up. For easier cutting, refrigerate rollups until cream cheese mixture is firm. Slice and serve cold with salsa.