Some ideas of restaurants that we recommend...
Very close to Saint Genouph :
La maison tourangelle (Traditional and refined cuisine, in Savonnières), La Doulce Terrasse (Castle restaurant, in Villandry), L'Etape Gourmande (Tourangelle cuisine, in a 17th century farmhouse, in Villandry)
In Tours :
La Table du Grand Marché (Refined cuisine. Terrace in the summer), Mamie Bigoude (Creperie with original decoration...), Le Chien Jaune (Brasserie), La Deuvalière (Traditional cuisine), La Petit Patrimoine (Traditional and local cuisine), Au Martin Bleu (fish restaurant and regional cooking).
Gastronomic tables in the surrounding area :
La Roche Le Roy (in Tours), Au coin des Halles (in Langeais), L'Aigle d'Or (in Azay le Rideau)