Looking at what you've been eating I DON'T think you're eating too MUCH in terms of volume. The only things I'd change are:
Whack in a bunch of vegetables - every single meal - think "how can I get some vegetables (or lower sugar fruit like apples and watermelon) into this?"
Swap (yummy yummy delicious) sourdough for a brown flat bread... boring AF... but in the short term it's worth it.
Cut out any refined sugar, this one is hard - you can replace it with something like Stevia (basically vile) but I've felt 100x better without refined sugar in my every-day diet (I still eat a slice of cake at a birthday, or whatever my hosts serve at a dinner).
Example day for me (losing weight, still podgy) - I probably eat more volume than you, but it feels nutritious.
B: Porridge made with almond milk + fruit.
S: Apple dipped in peanut butter (the good crunchy stuff)
L: Chicken salad with lime dressing (cucumbers, peppers, baby spinach, carrots)
S: Hardboiled egg in brown pitta with cucumber (egg mashed in mix of Greek yogurt and mayonnaise).
D: Chicken and bean bake (tomato sauce w. chipotle paste, onions, peppers, leeks, garlic).
I drink my coffee black and without sugar, it's an acquired taste, but it's now my preference.