What are "Entresijos" and "Gallinejas"?

We've recently had in Madrid the festivities in honor of its patron saint "San Isidro" (which official day is May 15th). They're celebrated in the "pradera de San Isidro" (medow), where you can find many food stalls and fairground rides. Two of the most traditional foods in Madrid are "Entresijos" and "Gallinejas", and they can be found almost in every stall there these days.
But what are they? Find it below!

Shikku Izakaya

In a tweet: Some people say it's the third best Japanese restaurant in Madrid. Very elegant; expensive. Can be good for business meetings or celebrations. It has a bar downstairs to have cocktails. They have more restaurants in Madrid.

Summary

Concept	Comment
Overall Score	7.9.
Price per Person	50 €. With one bottle of Albariño (white wine from Rias Baixas, Galicia: "Mar de Frades", 22€) and no desserts. We had 2 cocktails later in the bar, for another 10€each.
Food Type	Japanese

La Chimenea (The Fireplace)

In a tweet: GREAT. Best grilled steak I've tried in Madrid so far (and I've tried many). The cook is in a holm oak fired grill by the door where you can see the meat. Cheap for its great quality. When crowded you need to make a reservation, and there are two shifts; you have to choose, and they warn you that they may ask you to leave when time for the next has come.

Summary

Concept	Comment
Overall Score	9.2. I would recommend it for business meetings but it's away from Madrid, and in the weekends it's noisy.
Price per Person	30-35€.. Great value for money!
Food Type	Traditional

Bolivar

In a tweet: Modern restaurant of extremely high quality in all of their dishes. A bit expensive, overall taking into account the amount of the dishes, but you can find offers (for example in El Tenedor. Worth a try... or two

Summary

Concept	Comment
Overall Score	9
Price per Person	35€. with 40% discount (off the price before taxes; in the prices below, the discount hasn't been applied) except in drinks. We ate 6, had 2 bottles of wine (21€ each).
Food Type	Modern
Picture

Arrocería St. James (St. James Rice Restaurant)

In a tweet: Best rices I've tried in Madrid (and maybe in Spain), in a distinguished and pleasant restaurant in the heart of Madrid.

Summary

Concept	Comment
Overall Score	9.1
Price per Person	65€. Including 2 beers (3.20€ each), white wine (a nice easy to drink Viñas del Vero Chardonnay -17€, score 9), 2 desserts and 2 peach liquors -to which we were not invited, despite the common tradition, 4€ each). Expensive for being rice (usually cheap), but worth the price.
Food Type	Rices
Picture

El Paraguas (The Umbrella)

In a tweet: One of the best restaurants in Madrid. Excellent quality, atmosphere, service, presentation... In an elegant, sophisticated, luxury place. One of my favourites. Not cheap, but it's really worth every visit.

Summary

Concept	Comment
Overall Score	9.4
Price per Person	85€. With a 36€ bottle of wine ("Enate Merlot", score: 9), water (3.5€), one beer (3€) and a liquor at the end (6 e).Seems expensive, but it's not! It's so good that it's absolutely worth the price.
Food Type	Asturian
Picture

Gomez

In a tweet: Very good restaurant in an unexpected first floor over a "shabby" bar. Quality is great in most of the dishes. Not cheqp for being in a village nearly 60km from Madrid

Summary

Concept	Comment
Overall Score	8.1.
Price per Person	35€. You'd expect a cheaper price in a restaurant in a little village, but quality has a price
Food Type	Traditional