TheFork users who ate in Heeze have said really good things about Jojo's Delight, MT. Everest and L'Azzuro. Maybe you should give them a try!
Some of the more popular Traditional restaurants that offer vegetarian options on their menu in Heeze according to TheFork users include:
Jojo's Delight, with a 8.4 rating
L'Azzuro, with a 8.5 rating
Foodgasm 2.0, with a 8.7 rating
In those days what better than a traditional restaurant to retrieve the comfort of eating at home.