THEME:   anagrams of salad types found in random phrases   
GOOD ONES:     Light lunch {& theme}   
TOSSED SALAD [in a way the letters are tossed]   
Reading in an unruly class?   RIOT ACT [I thought "minimal"]   
For hire to sire   AT STUD [like the lilt]   
Roman numeral?   TRE [Latin & Italian for three]      
BTW:   Bottom-of-the-line   CHEAPO [needs "El" to complete the idiom]      
A Gallic cocktail ...   
Toi et moi   NOUS [at least the clue is also French]   
His, to Henri   
SES   La Tour de France time   
ETE      ... with a Northern twist   
Glaswegian's "Gee!"   
OCH   Time, in Germany   
ZEIT      Five totally foreign expressions lessens my appreciation of the puzzle.   
RATING: 
 
    Three grins = Loved it; Two grins = Enjoyed it; One grin = A bit bland for my taste; One teardrop = Not much fun