My aunt and I stopped here on our way to Brno from Teplice nad Metují on E461. There's a very…read morelittle driveway, easy to miss if you're speeding along, and a very little parking lot, but the building itself is hard to miss (it's bright orange). There's an outdoor seating area, as well as an indoor, and plenty of restrooms.
The staff there didn't speak English, and we couldn't read the Czech on the menu, but we didn't have too much difficulty asking for a vegetarian dish, tea, and coffee. They brought everything out pretty quickly too.
I got the "Čevapčiči s hořčicí a cibulí, šťouchané", which translates as "Chewbacci with mustard and onion, mashed" according to Google. It was kind of a sausage made of ground beef on a bed of lettuce and onion and some mustard flavored mashed potatoes. It was delicious!
My aunt had "Zeleninový salát s grilovaným camembertem a bylinkovým dresingem, pečivo" which translates to "Vegetable salad with grilled camembert and herb dressing, pastry" according to Google. This one was a lettuce and tomato salad with a dressing, topped with a fried Camembert cheese and some pieces of baguette on the side. My aunt said the only bad thing was that there was way too much dressing.
Over all, it was a good lunch/rest stop experience! I only suggest you learn some basic Czech if you can