she is SO good at detecting her own from ours which we give her the odd taste of.
Is there a reason you aren't all eating the same meal? Does she have allergies preventing her having your meals? If not then I would just cut out salt from your cooking (adults can add at the table if needed) and give her exactly the same as you have. Mine had a phase of being suspect about the food on his plate despite it being exactly the same as I was eating and I put it down to development and greater awareness of dangers. If they can put everything in their mouths it is good caution to get mummy to test the food and agree it is nice, not poison or harmful etc. I used to taste test his food of his plate and assure him it was good then he'd tuck in (I used to joke that I was the kigs jester, I think they used to taste for poison before the king ate didn't they?).
For vegies, if she likes chips I would make some oven baked chips of sweet potato, turnip, swede, carrot, all of which have nutrients and vitamins which potatoes don't offer - I also do home made potato chips too and mix them up a bit. If for example carrots are accepted then after a while try steamed carrots cut into the same shape. Even at almost 2.5 my LO occasionally asks me what something is because it is cut in a different shape/size so he needs to check what he's getting. And I would continue to put one piece of veg on her plate that is part of the family meal even if she doesn't like it or eat it. Just seeing it there makes it more familiar and she can start to explore it. If you just put one piece it's less to go on the floor or in the bin.
Sorry I just re-read your original post (I'm a bit distracted with LO teething) and see you were thinking of offering the same meal you eat - yes! Go for it. You can use spices, perhaps not too hot but my LO has always loved herbs and spices. I sometimes make something like a mild curry serve up DS's to cool then whack some more curry paste into the rest so it's hotter for me and DP. Garlic, herbs etc are all fine. I once saw a skin reaction from garam masala (which I had sprinkled over potato wedges before oven baking), DS ate them up and loved them but his hands, wrists and face around the mouth came out in blotches, so I washed him immediately and I avoided that spice mix since. He wasn't ill though, just a contact reaction.
In terms of cutting up I purposely made BIGGER chunks of food for DS in stews, steamed veg, etc not smaller. The bigger chunks (finger sized) are much easier to pick up and LO can hold one end in a fist whilst eating the other end, it gives more control over the food rather than a small piece. Once you are in the habit of chopping bigger, not using salt or sugar, it is really easy to make family meals. I still make allowances (tbh I make allowances for everyone, the vegetarians that visit, my mum's special diet, DP's particular preferences, so I make the same kind of allowance to DS's needs or preferences within reason), if we have rice he gets a tortilla or pitta bread or something instead as he has never liked rice, if we have fish I crumb and fry his because he likes 'fish fingers' but not 'fish'.
Finally - if you or your wife feel very concerned about the balance of the diet there is no harm in offering dinner type meals at breakfast time. If LO is hungry for breakfast she might be more willing to take a variety of foods at that time, but less willing when she is getting tired and a bit full towards the end of the day. As example my LO wasn't taking much protein so I switched breakfast to a protein meal (omelette or sausage) which he took without batting an eye, and the more carbsy foods might be accepted later in the day, snacks or lunch etc. You might look to switching one of the day milks to a snack soonish too, so either the mid morning or mid afternoon milk can become a healthy snack (good time to offer veg plus something you know she will take) alongside a sippy cup of water. Snacks are a good time to get added veg in even if it is hidden veg in sugar free sweet potato muffins, veg pancakes or bean and veg burgers/fritters, these can be batch cooked and frozen if needed, (the only thing I wouldn't offer are rice cakes because they can fill whilst not give nutrition and are low calorie. if LO isn't eating much then every mouthful needs (ideally) to be healthy and calorie or vitamin rich.
hope this helps some
