chicken breasts marinated in yogurt  grilled

: yogurt marinade:

1 ts toasted and crushed cumin seed
1/2 ts red chile flakes
2 ts roasted garlic
1/4 c minced scallions, -- white part only
1 c plain yogurt
1 ts paprika
1 tb fresh lemon juice
6 boneless, skinless chicken
: breast halves
: lemon-tarragon vinaigrette:
1/2 c fresh lemon juice
1 ts grated lemon zest
2 tb white wine vinegar
1 tb minced shallots
2 tb minced fresh tarragon
2 ts honey -- (or to taste)
1/2 c olive oil or -- 1/2 cup
: defa