Cheesy Broccoli Pasta

I didnt have enough of one type of pasta in my pantry so I used the remaining pasta in 3 different boxes.
3 cups uncooked whole wheat pasta
2 cups fresh broccoli florets
2 TBSP butter
2 TBSP plus 1 tsp all-purpose flour
1-1/4 cups chicken broth
1/2 cup fat- free half- and- half
4 oz process cheese (Velveeta), cubed
1 tsp garlic-herb seasoning blend
1/4 tsp salt
2-1/2 cups cubed cooked chicken breast
1/2 cup shredded cheddar cheese
In a large saucepan, cook pasta according to pkg directions, adding the broccoli during the last few minutes of cooking, drain.
In a large skillet, melt butter. Combine flour and broth until smooth; stir into pan. Add half-and-half. Bring to a boil; cook and stir for 1 min or until thickened. Add the process cheese, seasoning blend and salt; stir until smooth. Stir in pasta mixture and chicken; heat through.
Remove from heat; sprinkle with cheddar cheese. Cover and let stand for 5 min or until cheese is melted.