Place squash on cookie sheet and lightly oil. Place in the oven for 10 minutes to lightly cook. Remove and turn heat to 400°F.
Roll out pie dough and place inside a lightly greased and floured tart pan. Push against the edges and into the corners, remove the edge pieces to make tidy.
Add caramelized onions to the bottom of the dough, then lay out the sliced squash, tomatoes, and pears out on top.
Sprinkle with feta and thyme. Bake for 18-20 minutes, until crust is golden brown.
Let cool and remove from tart pan. Slice and enjoy!
Notes
- Dough: You can do store-bought or you can make from scratch by searching my site for "Pie dough".