Русско-английский словарь пословиц и поговорок
ЕШЬ ЩИ С МЯСОМ, А НЕТ, ТАК И ХЛЕБ С КВАСОМ
Take delight in it when you have much, but when in strained circumstances be content with little. See Ешь хлеб, коли пирогов нет (E), На безрыбье и рак рыба (H)
Cf:If thou hast not a capon, feed n an onion (Br.). They that have no other meat, bread and butter are glad to eat (Br.). They that have no other meat gladly bread and butter eat (Am.)