Solomillo a la mostaza y pimienta

Array
(
    [0] => Array
        (
            [amount] => 4
            [unit] => medallones
            [ingredient] => Solomillo
            [notes] => 
            [group] => 
            [ingredient_id] => 811
            [amount_normalized] => 0
        )

    [1] => Array
        (
            [amount] => 
            [unit] => 
            [ingredient] => Pimienta
            [notes] => negra molida
            [group] => 
            [ingredient_id] => 447
            [amount_normalized] => 0
        )

    [2] => Array
        (
            [amount] => 1
            [unit] => cucharada
            [ingredient] => Mantequilla
            [notes] => 
            [group] => 
            [ingredient_id] => 424
            [amount_normalized] => 0
        )

    [3] => Array
        (
            [amount] => 2
            [unit] => cucharadas
            [ingredient] => Mantequilla
            [notes] => 
            [group] => Para la salsa:
            [ingredient_id] => 424
            [amount_normalized] => 0
        )

    [4] => Array
        (
            [amount] => 1
            [unit] => 
            [ingredient] => Cebolla
            [notes] => pequeña bien picadita 
            [group] => Para la salsa:
            [ingredient_id] => 477
            [amount_normalized] => 0
        )

    [5] => Array
        (
            [amount] => 200
            [unit] => ml
            [ingredient] => Nata
            [notes] => de cocinar o de montar si es la que tenéis en casa
            [group] => Para la salsa:
            [ingredient_id] => 517
            [amount_normalized] => 0
        )

    [6] => Array
        (
            [amount] => 100
            [unit] => ml
            [ingredient] => Brandy
            [notes] => o coñac
            [group] => Para la salsa:
            [ingredient_id] => 985
            [amount_normalized] => 0
        )

    [7] => Array
        (
            [amount] => 1
            [unit] => cucharadita
            [ingredient] => Mostaza
            [notes] => de Dijon (cucharita de postre, no de café que es más pequeña)
            [group] => Para la salsa:
            [ingredient_id] => 610
            [amount_normalized] => 0
        )

    [8] => Array
        (
            [amount] => 
            [unit] => 
            [ingredient] => Pimienta
            [notes] => negra o verde en granos 
            [group] => Para la salsa:
            [ingredient_id] => 447
            [amount_normalized] => 0
        )

    [9] => Array
        (
            [amount] => 
            [unit] => 
            [ingredient] => Sal
            [notes] => al gusto
            [group] => Para la salsa:
            [ingredient_id] => 446
            [amount_normalized] => 0
        )

)

• 4 medallones Solomillo
• Pimienta negra molida
• 1 cucharada Mantequilla
• Para la salsa:
• 2 cucharadas Mantequilla
• 1 Cebolla pequeña bien picadita
• 200 ml Nata de cocinar o de montar si es la que tenéis en casa
• 100 ml Brandy o coñac
• 1 cucharadita Mostaza de Dijon (cucharita de postre, no de café que es más pequeña)
• Pimienta negra o verde en granos
• Sal al gusto